How about: pact of redemption?
If you or the party has done something wrong(hurting someone, killing someone, etc.) , then you need to do things that'll earn their forgiveness, bit by bit. Earning redemption shouldn't be a one-off act which would make it easy to cheat.
It could even be a change in the way your character sees and does things.
Last edited by DrunkenTofu; 10/09/15 03:21 AM.
